title: Highly selective iodide poly(vinyl chloride) membrane electrode based on a nickel(II) tetraazaannulene macrocyclic complex.
abstract: A PVC membrane electrode based on a nickel(II) tetraazaannulene macrocyclic complex as the carrier is described. The electrode exhibits an anti-Hofmeister selectivity sequence with a preference for iodide at pH 3.0-4.0. It has a linear response to iodide from 8.0 x 10(-6) to 1 x 10(-1) mol dm-3 with a slope of -54.7 +/- 0.2 mV per decade (20 degrees C), a satisfactory reproducibility and a rapid response time. The pH dependence of the potential response is discussed. The response mechanism of the electrode was investigated by ac impedance, quartz crystal microbalance and spectroscopic techniques. The electrode can be used for the determination of iodide in drug preparations.
authors.affiliation: Institute of Chemometrics and Chemical Sensing Technology, Chemistry and Chemical Engineering College, Hunan University, Changsha, China.
authors.forename: M
authors.initials: M
authors.lastname: Ying
authors.forename: R
authors.initials: R
authors.lastname: Yuan
authors.forename: X M
authors.initials: XM
authors.lastname: Zhang
authors.forename: Y Q
authors.initials: YQ
authors.lastname: Song
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Li
authors.forename: G L
authors.initials: GL
authors.lastname: Shen
authors.forename: R Q
authors.initials: RQ
authors.lastname: Yu
mesh_terms: D006571:Heterocyclic Compounds; D006863:Hydrogen-Ion Concentration; D007454:Iodides / Q000032:analysis*; D017736:Ion-Selective Electrodes; D008567:Membranes, Artificial; D009942:Organometallic Compounds; D011143:Polyvinyl Chloride
chemical_list: C110688:5,7,12,14-tetramethyldibenzo(b,i)(1,4,8,11)tetraazacyclotetradecahexenate; D006571:Heterocyclic Compounds; D007454:Iodides; D008567:Membranes, Artificial; D009942:Organometallic Compounds; D011143:Polyvinyl Chloride